You might not know it by name, but chances are you recognise the Johnston Underground typeface when you see it. It's the font — used in an adapted form— on posters and signs across the London transport network, and it's 100 years old this year.

London Transport Museum is celebrating the centenary of the lettering with a series of talks about the life and work of Edward Johnston, the man who designed it — he was also responsible for redesigning the now-iconic transport roundel.

First up, next week, is a talk at London Transport Museum about Johnston, The Man Who Branded London. Simon Garfield, author of Just My Type, will be offering an insight into the life and work of Johnston. It's also a chance to hear a bit more about the font itself and why it has become so important.

If this has piqued your interest, have a look at the other upcoming talks in the series. Tickets for talks cost £10 (£8 for concessions), but you can get tickets for two talks for £15 (concessions can buy tickets for two talks for £12), saving 25%.